Making multijunctions in organic solar cells with solution‐processed polymeric bulk heterojunction (BHJ) layers, i.e., tandem polymer solar cells (PSCs), has been one of the state‐of‐the‐art approaches for the last two decades. Tandem PSCs can overcome the single‐junction Shockley–Queisser limit by improving light absorption as they can exploit the polymeric BHJ layers with poor charge carrier mobility as subcells with limited thickness. Herein, 13% efficient triple‐junction tandem PSCs with a nanocrated hybrid interconnection layer (hICL) can be achieved by controlling the BHJ thickness (60 nm) of middle subcells is demonstrated. The open‐circuit voltage and fill factor (FF) of the optimized triple‐junction tandem PSCs reach 2.14 V and 74.3%, respectively. The present approach of middle subcell thickness control, using the reproducible hICL‐based multilayer stacking technology, delivers a promising way to further extend the number of junctions leading to high efficiency tandem PSCs with enhanced open‐circuit voltages and FFs.

中文翻译：

---

中间子电池厚度对三结串联聚合物太阳能电池性能的关键作用

在过去的二十年中，采用溶液处理的聚合物本体异质结（BHJ）层在有机太阳能电池中制造多结，即串联聚合物太阳能电池（PSC），一直是最先进的方法之一。串联PSC可以通过改善光吸收来克服单结Shockley-Queisser限制，因为它们可以利用电荷载流子迁移率较差的聚合物BHJ层作为厚度有限的子电池。本文中，具有纳米坑状混合互连层的高效13％三结串联PSC（h通过控制中间子电池的BHJ厚度（60 nm）可以实现ICL）。优化的三结串联PSC的开路电压和填充系数（FF）分别达到2.14 V和74.3％。当前的中子电池厚度控制方法，采用可重复使用的基于h ICL的多层堆叠技术，提供了一种有前途的方法，可以进一步扩展结点数量，从而产生具有增强的开路电压和FF的高效串联PSC。